Chlamydomonas, although a green algae, is sensitive to an antibiotic, erythromycin. If mt^- mating-type alga that is sensitive is mated with an mt⁺ cell that is resistant, and if the mt⁺ strain donates chloroplasts, what results do you expect and why? A)All progeny are sensitive because sensitivity is the dominant trait. B)Approximately half the progeny are sensitive because this is the recessive trait. C)All the progeny are sensitive because this is the recessive trait. D)All progeny are resistant because cpDNA is responsible. E)Approximately half the progeny are sensitive because cpDNA is responsible.

Question

Quizplus · Accepted Answer

The mt⁺ strain donates chloroplasts, and since chloroplast DNA (cpDNA) is responsible for the resistance, all progeny will inherit the resistant trait from the mt⁺ parent.

Chlamydomonas, Although a Green Algae, Is Sensitive to an Antibiotic